・Improved 12-speed combination guarantees maximum efficiency and acceleration in any racing situation
・Faster, smoother shifting with maximum pedaling power
・Compatible with new 12-speed and 11-speed road rear hubs

Product description
HYPERGLIDE+ cassettes revolutionized off-road shifting, delivering reliable performance in both directions. Now comes technology that will transform road cycling. Riders can shift gears even under maximum load on climbs or while racing against friends without breaking a sweat. Shimano ULTEGRA R8150 drivetrains with larger cogs deliver maximum efficiency in every gear and are also compatible with existing HYPERGLIDE rear hubs. The ULTEGRA CS-R8100 12-speed cassettes set new standards for road shifting.